Additive manufacturing with inorganic binders

The use of inorganic binder systems in the foundry industry is characterized by sustainability, energy and resource efficiency as well as improved working and environmental conditions.

Our Inorganic Direct Binding (IOB) process, combines the Binder Jetting 3D printing process with inorganic binders and allows the potential of inorganic chemistry to be utilized to an even greater extent. Filigree structures and high productivity are the result. 

Besides inorganic binder systems, voxeljet also offers standard foundry materials such as furan or phenolic resin.

Your advantages of inorganic binders

  • Future-proof: 
    Use of environmentally friendly materials. Only water vapour is produced during casting.

  • Recyclability:
    Unprinted sand can recycled and fed back into the process line.

  • Cost saving: 
    Complex filter systems for air purification are not required.

  • Productivity:
    3D printing systems running on inorganic materials offer a significantly higher output quantity than comparable systems from the voxeljet portfolio.


Technical data of our sandtypes and binder


Material Silica Sand
Typ GS 15
Medium Grain Size 150 µm
Applications Thin-walled casting cores

Binder type

Build space up to 1.000 x 600 x 200 mm
Binder type waterglass-based binder
Layer height 280 (standard)
Accuracy ± 0,4 % (min. ± 1,5 * layer thickness)
Loss on ignition residual moisture < 0,3 %
Resolution x, y 300 dpi

Digital production of complex sand molds

See here how the foundry Wolfensberger uses our technology for the production of complex casting cores: